I shot this series of photos yesterday, These are unedited straight from the camera (only added copyright watermark). They were shot in a high speed (6.5 photos per second) burst and are included in sequencial order.

This is how Hawkeye and Lark play, it's a little scary and they do yelp once in a while when they really go at it, and I swear one is going to break the other on impact one day.